#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
int main()
{
    pid_t id = fork();
    if(id < 0)
    {
        perror("fork");
        exit(-1);
    }
    else if(id == 0)
    {
        printf("I am child pid::%d ppid:;%d\n", getpid(), getppid());
    }
    else{
        while(1)
        {
            printf("I am father pid::%d  ppid::%d\n", getpid(), getppid());
            sleep(1);
        }
    }

    return 0;
}
